I don't know how they get away with it, but I have seen cheap, all in one surround sound systems advertised which have sound output lights on the front to indicate "stereo" and "5.1" modes. Some buyers would think they are enjoying a DVD in Digital 5.1 surround on the 5.1 setting, but, There are no digital inputs on the back of the unit. Just L & R RCA.!!!!!!!! I hope no one has been fooled by this.